Often performing a well video inspection is the easiest way to determine the structural condition of a well. A video gives a unique internal view and when completed under pumping conditions it is possible to see any point or points where things (water, debris etc.) are entering the well. One obstacle that can be encountered is turbid water – clear water is necessary in order to obtain visual results. WIL is equipped with three different camera systems and can complete video inspections on wells ranging in diameter from 75mm (3”) to 750mm (30”) and at a depth up to 300m (1000’). Our video systems are comprised of a Laval 2000, Laval 1000 and Ridgid SeeSnake. Our wide range of temporary pumping systems allows us to pick the flow rate best suited to each pumping video inspection
In cases where a permit to take water is needed for new well construction an aquifer test must be completed to determine the impact that the new water usage will have on all the local users of the same aquifer. This is usually limited to new municipal supply wells or wells completed for commercial, industrial or irrigation purposes. WIL is uniquely equipped to handle all aspects of the aquifer testing process from drilling the test wells, supplying and installing temporary test pumps and generator systems, and the sourcing and final installation of any permanent pumping. WIL also owns more than 2,000 m (6,500’) each of 50mm (2”), 100mm (4”), and 150mm (6”) lay flat hose available at any time for testing purposes. We also have calibrated flow meters of various capacities to accurately measure instantaneous and overall pumping amounts.
Well and Pump Performance Testing
Over time the capacity of both your well and pump can decrease. Losses in pump performance can be caused by frequent starting and stopping, pumping of sediment laden water, buildup of mineral or iron precipitate inside pump assembly, improper pump sizing, and normal wear and tear due to age among other things. Losses in well performance can be attributed to (but not limited to) over pumping, mineral and iron precipitate, incorrect well design, age, aquifer changes and overall water chemistry. By pumping the well and measuring water levels and pump pressures at various rates and comparing this data to the as constructed pumping data it is possible to determine if the well needs to be rehabilitated to restore lost capacity. By comparing the existing pump capacity to the factory supplied as constructed information it is possible to determine what condition the pumping equipment is in.
Grain Size Analysis & Well Screen Design
The correct selection of a well screen is a crucial step to installing an overburden well that will operate sand free while providing the greatest amount of obtainable water from an aquifer. Many contractors do not know how to install well screens or lack the ability to properly select a screen with suitable openings. By completing a grain size analysis of a water bearing layer of sand and gravel it is possible to custom design a well screen of various lengths and slot openings. The well screens themselves are tightly woven stainless steel and come in various lengths and diameters which can be threaded or welded together to create a screen design perfect for your aquifer when needed. Many contractors that install well screens are very conservative on screen selection, often wells are installed that are very inefficient / low yielding. Contact us for more information on screened well installations.
Peer Review and Compliance Inspection Service
WIL has experience completing peer reviews required by the Ministry of Environment and Climate Change as well as those requested by municipal and commercial entities. These reviews are necessary when a portion of the work performed by others has to be evaluated by a third party for quality and/or regulatory purposes. In general municipal wells will be inspected for compliance issues on a routine basis but most private wells are only inspected when the property changes hands. If you have any concerns about the state of your well head please contact us to arrange for a quick check.